Update mydns.jp address information using powershell

updateMydns.ps1

Param(
    [Parameter(Mandatory = $true)]
    [String] $UserName,
    [Parameter(Mandatory = $true)]
    [String] $Password
)
[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12

$credential = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes($UserName + ":" + $Password))

$client = [System.Net.WebClient]::new()
$client.Headers.Add([System.Net.HttpRequestHeader]::Authorization, "Basic " + $credential)

$page_content = $client.DownloadString("https://ipv4.mydns.jp/login.html")
echo $page_content

$page_content = $client.DownloadString("https://www.mydns.jp/login.html")

echo $page_content